| http://www.w3.org/ns/prov#value | - A compound of the formula ##EQU2## where R is selected from a group consisting of --SCCl.sub.3, Y--S.sub.x where x is an integer from 0 to 3, inclusive, and Y is theradical in parentheses,lower alkyl,cyano lower alkyl,isothiocyano lower alkyl,amino lower alkyl where amino is NH.sub.2, lower alkyl NH--, (lower alkyl).sub.2 N-, 1-pyrrolidinyl, piperidino, morpholino, or 1-hexamethyleniminyl,lower al
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